%p{class="foo" http-equiv="#{10-9}" for="bazbob" accept-charset='#{"1" + "-" + "2" + "-" + "3"}'} Foo
%p{class="bar" http-equiv="1" for="bazbob" accept-charset="1-2-3"} Bar
- let b = ""
%p{class="class=b='class=b'" id="class=b=foo, id=b=bar"} Bar
%html{lang="en" xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"} Baz
- let b = "bar"
%p#foo{title="Pip" class='#{b}'} Bum
%p#foo{class='#{b}'} Bum